[lepton]

So, what they're saying is that the MatchKing is not a Frangible round. That would make the MatchKing legal...but frangible rounds are not.

[Shooter 2.5]

The purpose of Sierra MatchKings are for long range competition. Sierra doesn't even recommend them for hunting.

The design of the MatchKing is a lead cylinder inside a copper jacket that is made as long as possible by weight and the ability of most of them to fit inside the magazine. By keeping the nose of the bullet hollow, they kept the weight down and still offered an extremely long bullet for bearing surface against the rifling. As far as the bullets being hollow points, it isn't even noticeable.

The .223 80 grain cartridges don't even fit inside the magazine. They're designed for the last relay in High Power competition where the cartridge has to be single loaded.